Screen or separator.



Ta. STURTEVANT. 4SCREEN 0B SBPARATOR. APPLICATION FILED .JANJL 1913. ,0'?2,8'79. Patented sept. 9, 1913.

3 SHEETS-SHEET 1.

T. J'STURTEVANT. SCREEN 0B SEPARATOE.

APPLICATION FILED JAN. a, 1913.

Patented Sept. 9, 1913.

3 SHEETS-SHEET 2.

IN VE N T 0R.'

einem all whom it may concern rraN s an f 'a'nonrns .inserer s'rfon'rnvnnr, or wnLLnsnnY, MassAonUsnrTs, nssionon 'To sarnafrnvaur 'MILL COMPANY,

dici-ease the output and expedite the screen- -fnO-n't elevation of the saine.

- ratorf'embodying a diil'erent ing loperation by the use. ot air lcurrents which will pass through ing and vibrate the same more or less; these air` currents being preferably of an alternating', pulsating or reversing character so :that when moving in onev direction they will tend to clear the meshes of the screen ot 'material which may be lodged thereon or therein, and While moving 1n the vopposite direction will .tend to .suclr or draw tine material through the meshesy of the screen y.

'clothing at a more rapid rate than would result `simply `from gravity, thereby expediting the screening operation and in- Icreasing the output. These pulsating air ciutirents are preferably `roduced by Lairl:"tgitatirfg devices located lielow the screens adjacent thereto, and which air-agitatfingf' Adevices may be ,of any suitable character,` as will lie-hereinafter more fully .indicated.

` ll'nthc accompanying dra-wings, in which similar reference numerals denote similar parts, Figure l is a side view, partly in section,` of a 'ofthe' preferred mechanisms for carrying the linvention into effect, and Fig. 2 is a Fig. 3 is a screen or sepaform of the Ainand F ig.

sectional side elevation of a vention from that shown inrFig. l,

t is a front view of the separator shown'I in Fig. tig. 5 is a sectional Vview illustratingstill another embodiment of the invention-n Figs. G and 7 are detailviews of the fan: belts shown in Fig. v Y vltcerring to Figs. 'l and 2 of the drawL ings, 12 denotes a v.suitable framework sup- Specification of Letters Batent. application inea January s, una.

the screen cloth-.

`chambers in which the screen or separator embodying oneA A CORPORATION OF MINE.

SCREEN 0R SEPARATOR.

Patented Sept. 9, jwl. Serial No. 740,415.

porting acasing 13 which will preferably comprise a hingedcover 14. At theupper part of the said framework or casing is mounted a hopper l5, to receive the incoming material. and Within said hopper is a ,feed-wheel, 1G which' will be rotated at a speed suitable to properly feed the material to the screen. The said screen will preferably consist of tine-wire mesh screen clothing 17 stretched on a suitabler frame 18 properly supported Within the chamber of theseparator and preferably inan inclined positlon.

`Mounted on suitable su ports or brackets 1S) secured to they screen eine is a driving shaft 20 `provided with -a crank 2l, 'said driving shaft being furnished with a pulley 22 which may be belted to any suitable source of power.

by apitman 23 with a piston rod 2a on .which are mounted aserles 4ofpistons Q5 arranged below and adjacent to they fine mesh screen 17, said pistons reciprocatin in chambers formed by partitions 26. Tese pistons reciprocate have openings at their bottoms for the discharge of the screened material into the receiving hopper below. The piston' rod passes at its lower end through a steadyingr and guiding bracket 27 mounted on the casingll. Y.

In the form of the invention just de scribed the reciprocating pistons,.wl1en the machine is in operationyp'xll cause pulsating or alternating air currents, more or less .of which Will Apass through the line mesh The crank 2l is connected.

sie

screen in'opposite directions, as the pistons in the piston chambers, tor the purposefof clearing the screen when the air currentsare upward, and also for the purpose of sucking or drawin(t fine material through the screen when tie air currents are "dotvwardt this j operation gently vibrating the tin eeh screen and expediting the screening-` operation by alternately clearing the screen" clothing and suckinfr fineV material thrcfughv thefs" i;

y n that tlie Voutput; of the macbihevttil move back and forth greatly increased over what 4vvcipldresult merely from tbe action of gmvpitfyj f In the form ofthe invention-shown m Figsptl and 4 the air-agitiitinjg* device, to

ctlect 'the reversing or pulsating air eurrents',` comprises fan belts 28runn1ng over 'the arrows the inclined wings or fans 30 will-have a tendency to torce the air upward .againstand through the tine. mesh screen, while' the wings or. fans 3l will have a tendency to draw air downward, thereby producing alternating or pulsating air currents which will gontly'vibrate the tine mesh screen and operate to clear the saine 'and to draw fine material therethrough. The pulle 'S 29 are driven from the power shaft- 32 which is provided with a pulley connect'- ed by a belt 33 with a pulley 35 on the shaft 36 on which the 'lower pulleys 29 are mounted.

In the forni of the 4invention shown in '.Fig. 5' the alternating air euri-ents are caused by vibrating ans'f? mounted on rock shafts 38 which may be operated in .any suitable manner, as by a pitman 39 connecting one of a series of gears l42 on said shafts with a crank 40 on a suitable driving shaft 41.

In all of the different 'forms of the invention shown the screens 17 and the trames supporting the saine are. tixed or stationary, in contradistinction to shaking or rotary movable screens. Also in all of the forms of the invention shown the air-stirring or airforeing elements 'are separated from or out of Contact with the screens, so as not to rub aga-inst them, which would result in serious wear and injury.

The movements of the air agitating devices may be at any desired speeds, and may beand will preferably be more or less ii'- regular and such will be the `:ease in the coni struction shown forexainple in Fig. 1 Where the air agitating pistons are operated from a crank in such a manner that their movements will be more or less irregular. e

The air-agitating devices, operating `in accordance with this" invention, will preferably be so' disposedl as to ycause the air eurrents to strike or pass through the screen clothing atan angle inclined tothe plane ot" the latter, so that hy thus giving aslant to the air currents theetl'ect willbe to make the working sizel of the screen Vii-ieslies iinor, lilge the etl'ect produced by changing a horizontal screening surface to an `inclined position. This result is ett'eeted, iiithe several ditferent forms oi" the .invention herein shown, by so arranging and operating the air-stirring devices -that the wings or air- Stirring membersI thereof are caused totra vel in planes parallel to the planes injvhich the screens are disposedI` or approximately so,

in performing their.pulsating air-stirring movements. I erably be employed in connection with injl elined screens, as shown in Figs. 1 and 3,

Also the invention will pre'l" butit may also be used in connection with a horizontal screen, as shown 'in Fig, 5. y

lt will be obvious that in the several forms of the invention herein shown and de scribed, and in which, in each iorin of the invention, the air agitating device comprises a plurality of air-forcing elements spacedapart from each other, air currents will be caused to pass through diiierent portions of the screen in opposite directions at t-liesaine time. For example, in the form of the invention shown in Fig. 1 the pistons 25, working in'compartments formed hy the partitions 26, will force the air upward'on one side of each piston and will cause a downward suction of' air on the opposite side thereof; and this simultaneous upward and downward movement'- of air currents through different portions of the screen will, itis obvious, result in the operation of the otherforins of the invcintion shown and described.

rlhe, invention is not tobe understood as being limited to the details of construction herein shown and described, as these may be 'varied widely, within tlie limits of mechanti .mat-,ely parallel to that' in whirhthe said screen vis disposed in 1an-forming their airstirring movements.

2. ln a separator, the combination with a screen, ot a i'Lu-.iproci'iting air-stirring device coniprising air-stirring members arranged adjacent to but separated 'trom said screen,

and means for causing said :iii-stirring members to travel in a plan approximately parallel. to thaty in which the said screen is dis-postal in performing their air-stirring movements.v y i 3. ln a seliarator, the combination with a fixed or stationary screen, ol" an air-stirring device coii'iprsing air-stirringmembers arranged beneatlrand adjacent to but separated 'from said screen, and means for causing said air-stirring members to travel in a plano approximately parallel to that in which the said sr Aeen' is disposed in per. forming their air-stirring movements.

4. ln a separator, the combination with an inclined sci-een, oi .i'nair-stirriiig device comprisingair-stirring members arranged i'idyacentto,but separated from said screen, 'and means for lcausing said airstirring members to travel in. a plane approximately j said screen,

parallel to that in which the said screen is isposed in performing their air-stirring movements. v

5. In a separator, the combination with an inclined screen, of an air-stirring device comprising air-stirring members arranged beneath and adjacent to but separated from and means for causing said airstirring members to travel in a lane approximately parallel to that in Whic screen is disposed in' performing their airstirring movements for theV production of pulsatingvair currents which pass reversely or alternately through the screen clothing.

6. In a separator,

inclined screen, of a reciprocating air-stirring device comprising air-stirring members arranged beneath and adjacent to but separated from said screen,l and means for causing the said air-stirring members to travel in a plane approximately parallel to that in which the said screen is disposed in performing their air-stirring movements for the production of pulsating air currents which pass reversely or alternately through the screen clothing. Y

7. In a separator, the combination with a fixed or stationary screen, of an air-agitating device comprising a plurality of re- A versely-acting air-forcmg elements arranged adjacent to but separated from said screen and spaced apart from each other, and means for moving said air-forcing elements; whereby reversely moving. air-currents Will be caused to -pass in opposite directions through different portionsof said screen si- ,multaneously 8. In a separator, the combination with a fixed or stationary screen, of an air-agitating device comprising a plurality of reversely-acting air-forcing elements arranged below and adjacent to but separated from said the saidL the combination with an.;

screeiiand spaced apart from each other, and means for moving said air-forcing elements; whereby reversely moving air currents will be caused to pass in opposite directions through diiierent portions of said screen simultancously.

9. Ih a separator, the combination with an inclined. screen, of an air-agitating de'- vice com rising a'plurality of reversely-actfino airorcing elements arranged adjacent tol-but separated 'trom said screen and spaced apart from each otlier,'and means for moving said air-forcing elements; whereby reversely moving air currents will be caused to pass in opposite directiona through diderent portions of said screen simultaneously.

10. In a separator, the combination with an inclined screen, of an air-agitating device comprising a plurality of reversely-acting` air-forcing elements arranged below and adjacent to but separated from said screen and spaced apart from each other, and means for moving said air-forcing elements; whereby reversely moving air currents Will be caused to pass in opposite directions through different portions multaneously.

11. In a separator, the combination with a iixedor stationary screen, of an air-forcing device which is out of Contact with said screen and which is arranged to reciprocate approximately parallel with the latter, and means for operating Said air-forcing device; whereby air currents will be caused to pass simultaneously through different portions of said screen in opposite directions.

In testimony whereof l aiiix my signature, in presence of two Witnesses.

Witnesses W. iVALLis,

H. A. ToMLiNsoN. 

